DE102017205303A1 - Harrow - Google Patents

Abstract

The invention relates to a hand-held harrow, in particular a lawn mower, with a housing and with a guide device, wherein the guide device has two telescopically guided guide members, wherein the first guide member comprising a switching unit handle and wherein the second guide member is a pivot unit for pivotally mounting the guide device relative to the housing of the harrow. It is proposed that a fixing unit for releasably fixing the guide members to one another is arranged on the first guide member.

Description

State of the art

In the CN 103283374 A is a lawnmower with a telescopic guide rod, which is pivotally connected to the housing of the lawn mower described.

Disclosure of the invention

The invention relates to a hand-held harrow, in particular a lawn mower, with a housing and with a guide device, wherein the guide device has two telescopically guided guide members, wherein the first guide member comprising a switching unit handle and wherein the second guide member is a pivot unit for pivotally mounting the guide device relative to the housing of the harrow. It is proposed that a fixing unit for releasably fixing the guide members to one another is arranged on the first guide member. Advantageously, thereby a simple height adjustment of the guide device can be realized.

A tillage implement is to be understood to mean in particular a garden implement that is used when working in the garden or in parks. The cultivator preferably has a motor, which may be designed as an electric motor or as an internal combustion engine. The electric motor can be powered by a mains connection or by means of an integrated power supply such as a battery or a removable battery pack with energy. The engine of the harrow is at least partially received in the housing. Preferably, the housing has a chassis on which at least two wheels can be rotatably mounted and by means of which the harrow can be moved over the ground. With the housing, a guide device is connected, which has a handle. When using the harrow, the harrow can be gripped on the handle and guided over the guide device. By telescoping guide members into each other, the height of the handle can be customized user-specific. The guide device extends from the housing in particular obliquely in height. The guide device is pivotally mounted about the pivot unit about a pivot axis on the housing of the harrow. By the pivoting unit, the guide device for space-saving stowage of the tillage device can be pivoted in particular from a position extending obliquely in the height into a position extending parallel to the longitudinal extension of the harrow. About the fixing unit, the height of the guide device is adjustable. The fixing unit is in particular arranged on the first guide member such that the movement of the first guide member is coupled to the movement of the fixing unit. The fixing unit and the handle are arranged in particular on opposite end regions of the first guide member.

Furthermore, it is proposed that the pivoting unit has an actuatable securing device which, in an unactuated state or locked state, prevents pivoting of the guiding device relative to the housing. Advantageously, thereby an unintentional pivoting of the guide device can be prevented. The securing device can be actuated in particular via a movement of the first guide member. In the unactuated state of the securing device, the number of degrees of freedom of the pivoting unit is limited by at least one degree of freedom. Preferably, the pivoting unit is formed substantially as a hinge, wherein in the unactuated state of the securing device, a rotational degree of freedom of the rotary joint is blocked. In the actuated state of the securing device, at least one rotational degree of freedom is released in at least one direction.

Furthermore, it is proposed that the first guide member has an unlocking element, which is designed to actuate the securing device of the second guide member. Advantageously, by a relative movement of the two guide members to each other, the securing device can be operated in a simple manner. The at least one unlocking element is arranged in particular at least partially on the outer surface of the guide device.

In addition, it is proposed that the unlocking element associated with the fixing unit, in particular formed by a fixing of the fixing unit, is. This allows a particularly cost-effective design of the guide device. The unlocking element is advantageously arranged on the end side of the pivoting unit facing the end of the first guide member, in particular of the fixing housing.

Furthermore, it is proposed that the securing device has a spring-loaded securing element, which is movably mounted along the telescopic direction in the securing device and which is non-rotatably connectable to the housing. The securing device is thereby advantageously kept in the unactuated state. The telescopic direction corresponds to the translational degree of freedom along which the first guide member is movable relative to the second guide member. at a movement in the telescopic direction, the first guide member is moved in particular in the direction of the housing of the harrow. In a movement counter to the telescopic direction, the second guide member is in particular moved away from the housing of the harrow. The securing element is acted upon in particular by a spring element with a force. In the unactuated state, the securing element is in particular arranged such that the guide device is rotatably connected by the securing element with the housing of the harrow. In the actuated state, the securing element is moved counter to the force of the spring element in particular such that the guide device is rotatably connected to the housing of the harrow.

Furthermore, it is proposed that the securing element can be actuated by a force application by the unlocking element. The force through the unlocking acts in particular in the telescopic direction on the securing device.

In addition, it is proposed that the securing element has at least one projection which can be fixed in a housing bearing element of the soil cultivation device. The at least one projection extends in particular perpendicular to the telescopic direction. In particular, the projection has a contact region which, in the locked state, lies substantially against the housing, in particular on the housing bearing element, of the soil cultivation device.

Furthermore, it is proposed that the at least one projection of the securing element and / or the housing bearing element of the soil cultivation device are designed for locking during a pivoting movement of the guide device and for unlocking during an axial displacement of the securing element. Advantageously, a particularly comfortable operation of the swivel unit is realized for the user.

Furthermore, it is proposed that the projection of the securing element and / or the housing element of the soil cultivation device each have an undercut area and a sliding area. Advantageously, a particularly secure connection can be realized by an undercut. The undercut regions and the sliding regions are arranged in particular in the contact region of the projection with the housing bearing element. The undercut regions are in particular designed to block in the locked state pivoting of the guide device in at least one direction about the pivot axis. The sliding regions are in particular designed to translate in the unlocked state, a pivoting movement of the guide device relative to the housing in a linear movement of the securing element.

In addition, it is proposed that both the fixing unit and the pivot unit can be actuated by way of a force on an operating element of the fixing unit. Advantageously, the operation of the guide device is further improved by this measure.

Furthermore, the invention relates to a hand-held tillage implement, in particular a lawn mower, with a housing and with a guide device, wherein the guide device has two telescopically guided guide members, wherein the first guide member comprises a handle unit comprising a switching unit, and wherein the guide device comprises a fixing unit with at least has two opposite fixing elements for releasably fixing the guide members together, wherein the fixing elements are movable via an actuation of an operating element. It is proposed that the movement of the fixing elements is coupled to one another in the direction of a release position and in the direction of a fixing position. Advantageously, this realizes a particularly smooth operation of the fixing unit.

The at least two fixing elements are in particular contrary to a straight line perpendicular to the telescopic direction. The fixing elements are preferably designed to be movable perpendicular to the telescopic direction. In the actuated state of the fixing unit, the fixing elements are in particular moved such that the fixing of the guide members is released and the first guide member can be moved relative to the second guide member along the telescopic direction. The fixing elements are connected to one another via at least one component, such as the operating element, in such a way that the movement of the fixing elements is coupled. In this context, a coupling is to be understood in particular as meaning that the connections of all the components via which the fixing elements are connected to one another are designed as articulated connections, for example pivot joints, or as guides running into one another, such as guide slots.

Furthermore, it is proposed that the operating element of the fixing unit is arranged in particular centrally between parallel tubular elements of the guide device. In particular, the first guide member and the second guide member are at least partially formed by the parallel tube elements. About the parallel tubular elements are the first guide member and the second guide member guided into each other, in particular, the pipe diameter of the tubular elements of the first guide member is greater than the pipe diameter of the tubular elements of the second guide member. The tubular elements of the second guide member can thus be received by the tubular elements of the first guide member. Advantageously, the control can be operated by the central arrangement for both left and right-handed equally comfortable.

In addition, it is proposed that the length of the operating element is at least one third of the distance of the tubular elements from each other, in particular at least two thirds of the distance of the tubular elements from each other. Advantageously, a particularly easy-to-use control can be realized thereby.

Furthermore, it is proposed that the force acting on the actuation of the operating element is transmitted off-center. Advantageously, the force transmission to the fixing elements can be improved by this measure. The force acting on the operating element is transmitted in particular via at least two power transmission areas. The power transmission areas are preferably spaced symmetrically from the center of the operating element, which can ensure that the operating element, regardless of the location where a force acts on the operating element, without tilting in the telescopic direction is displaced.

Furthermore, it is proposed that the fixing elements are connected to the operating element in such a way that the force acting on the actuation of the operating element is transmitted directly to the fixing elements. Advantageously, a particularly cost-effective fixing unit can be realized thereby. In particular, the fixing elements are at least partially mounted in the operating element.

In addition, it is proposed that the operating element of the fixing unit has a guide slot, in particular a guide slot running obliquely to a telescopic direction, which is designed to guide the fixing elements at least partially. As a result, a particularly efficient transmission of the force to the fixing elements can be realized. There are various designs of the guide slot conceivable, such as a straight groove, an oblique groove, an annular groove, etc. It is alternatively also conceivable that the guide slot is arranged on the fixing elements.

Furthermore, it is proposed that the fixing elements are connected via at least one transmission element to the operating element, so that the force acting on the actuation of the operating element is transmitted to the fixing elements via the at least one transmission element. As a result, the power transmission to the fixing is further improved. The transmission elements are in particular designed to convert the translatory movement of the operating element in the telescopic direction into a translatory movement of the fixing elements perpendicular to the telescopic direction.

Furthermore, it is proposed that the at least one transmission element is designed as a pivotally mounted lever, which is connected at least in a form-fitting manner with the fixing element. A positive connection should be understood to mean in particular an at least partial interlocking of the interconnected components.

In addition, it is proposed that two transmission elements are guided one inside the other. Advantageously, this realizes a particularly efficient coupling of the fixing elements. In particular, the transmission elements have a guide slot on at least one end. Preferably, the two transmission elements in the region of the center of the control element are guided into each other.

Furthermore, it is proposed that the fixing unit has at least one restoring element, that the operating element, the transmission element and / or the fixing element acted upon by a restoring force. The restoring force acts in particular such that the fixing elements are moved or held in the direction of a fixing position. Preferably, the return element is arranged such that the restoring force acts counter to the telescopic direction.

Furthermore, it is proposed that the fixing unit has a fixing housing in which at least the fixing elements are mounted. Advantageously, the movable components of the fixing unit are protected by the fixing housing.

In addition, it is proposed that in the unactuated state, the control element is flush with the fixing of the fixing unit. Advantageously, thereby a particularly compact fixing unit can be realized.

Furthermore, it is proposed that the first guide member and / or the second guide member are at least partially mounted in the fixing housing. Advantageously, the guide device is thereby stored at least partially securely in the fixing housing.

Furthermore, the invention relates to a hand-held harrow, in particular a lawn mower, with a housing and with a Guide device, wherein the guide device comprises two telescopically guided guide members, wherein the first guide member comprises a handle unit comprising a switching unit and the second guide member is connected to the housing. It is proposed that a movement of the first guide member is limited against a telescopic direction via a limiting element, which is fastened to the first guide member via at least one first attachment region and to the second guide member and / or to the housing via at least one second attachment region. Advantageously, a particularly cost-effective construction of the soil cultivation device can be realized thereby.

Preferably, the maximum height of the guide device, or the first guide member can be adjusted via the limiting element. In particular, the first guide member is secured via the limiting element on the second guide member against losing. The limiting element is preferably fastened in the attachment areas such that the attachment can not be released without tools. The attachment of the limiting element in the attachment areas by a non-positive and or positive connection. The limiting element is at least partially, in particular at least between the first attachment region and the second attachment region, flexible or elastic. Advantageously, the limiting element is thereby loaded during a movement of the first guide member relative to the second guide member exclusively upon reaching the maximum height of the first guide member with a tensile force. In particular, the limiting element is loaded exclusively against the telescopic direction with a tensile force.

In addition, it is proposed that the limiting element is designed as a flexible cable element. Under a cable element to be understood in this context, a long, thin and flexible shaped metal or plastic cable. The cross section is advantageously formed substantially circular. It is conceivable, for example, that the cable element consists of a wire, in particular a braided wire or strand for the transmission of data and / or electrical energy.

Furthermore, it is proposed that the guide member has a fixing unit for releasably fixing the guide members to one another, wherein the fixing unit comprises a fixing housing in which the first or the second fastening region of the limiting element is arranged. Advantageously, a particularly secure attachment can be achieved.

Furthermore, it is proposed that the first fastening region in the fixing housing of the fixing unit and the second fastening region are arranged in the housing of the soil cultivation device.

In addition, it is proposed that the delimiting element is guided at least partially in a groove in the first attachment region and / or in a groove in the second attachment region. By a guide in a groove, the limiting element can be advantageously performed safely in the mounting area. Under a groove should be understood in this context, in particular a depression in the material or a narrow channel, in particular a cable channel. The diameter of the groove substantially corresponds to the diameter of the limiting element. Alternatively, the groove may also be slightly smaller to achieve a clamping effect.

Furthermore, it is proposed that the limiting element in the groove in the first attachment region and / or in the groove in the second attachment region is guided in sections transversely to the telescopic direction. Advantageously, the force can be transmitted to the housing at a tensile load of the limiting element in the telescopic direction.

In addition, it is proposed that the delimiting element in the groove in the first fastening region and / or in the groove in the second fastening region is guided in sections U-shaped or S-shaped. Advantageously, the power transmission to the housing is thereby improved.

Furthermore, it is proposed that the first fastening region and / or the second fastening region have at least one frictional connection element for non-positive fastening, in particular for clamping fastening, of the limiting element. By this measure, advantageously, the attachment of the limiting element can be further improved. Preferably, the at least one adhesion element is arranged in the groove of the first and / or the second attachment region. The traction element can be designed, for example, as a local reduction of the cross section of the groove.

Furthermore, it is proposed that the delimiting element is reinforced in sections, in particular partially reinforced between the first attachment region and the second attachment region. Advantageously, the life of the limiting element is thereby increased. The reinforcement is preferably carried out in the areas that are more heavily loaded when using the guide device, in particular the areas of the limiting element, the tensile load frictionally abut the housing of the harrow or the fixing housing and where the limiting element is supported. The reinforcement takes place in particular by an additional sheathing of the limiting element. The sheath is advantageously formed of a plastic.

In addition, it is proposed that the limiting element is designed as a cable element for connecting an electronics of the soil cultivation device with the switching unit of the first guide member.

list of figures

Further advantages emerge from the following description of the drawing. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

• 1a eine perspektivische Ansicht eines Bodenbearbeitungsgeräts in einer ersten Ausführungsform;
• 1b eine perspektivische Ansicht des Bodenbearbeitungsgeräts nach 1a im zusammengefalteten Zustand;
• 2a eine perspektivische Teilansicht einer Fixiereinheit gemäß 1a;
• 2b eine perspektivische Teilansicht der Fixiereinheit gemäß 1a im betätigten Zustand;
• 2c eine perspektivische Ansicht eines Bedienelements der Fixiereinheit gemäße 2a;
• 3a eine perspektivische Teilansicht der Fixiereinheit in einer zweiten Ausführungsform;
• 3b eine perspektivische Teilansicht der Fixiereinheit gemäß 3a im betätigten Zustand;
• 4 eine perspektivische Teilansicht d Schwenkeinheit gemäß 1a;
• 5a ein Querschnitt durch die Schwenkeinheit gemäß 4;
• 5b eine perspektivische Ansicht der Schwenkeinheit gemäß 4 im betätigten Zustand;
• 5c eine Querschnitt durch die Schwenkeinheit gemäß 4 im betätigten Zustand;
• 5d eine Seitenansicht der Schwenkeinheit gemäß 4 im entriegelten Zustand;
• 6a eine perspektivische Ansicht eines Begrenzungselements gemäß 4, angeordnet zwischen einem ersten Befestigungsbereich und einem zweiten Befestigungsbereich;
• 6b eine perspektivische Ansicht des zweiten Befestigungsbereichs;
• 6c eine perspektivische Ansicht des ersten Befestigungsbereichs.

Show it:

• 1a a perspective view of a tillage implement in a first embodiment;
• 1b a perspective view of the harrow after 1a in the folded state;
• 2a a partial perspective view of a fixing unit according to 1a ;
• 2 B a partial perspective view of the fixing unit according to 1a in the actuated state;
• 2c a perspective view of an operating element of the fixing according to 2a ;
• 3a a partial perspective view of the fixing unit in a second embodiment;
• 3b a partial perspective view of the fixing unit according to 3a in the actuated state;
• 4 a perspective partial view d pivoting unit according to 1a ;
• 5a a cross section through the pivoting unit according to 4 ;
• 5b a perspective view of the pivoting unit according to 4 in the actuated state;
• 5c a cross section through the pivot unit according to 4 in the actuated state;
• 5d a side view of the pivoting unit according to 4 in the unlocked state;
• 6a a perspective view of a limiting element according to 4 disposed between a first attachment area and a second attachment area;
• 6b a perspective view of the second mounting portion;
• 6c a perspective view of the first mounting portion.

Description of the embodiments

In 1a is a tillage implement 10 shown in a first embodiment. The tillage implement 10 is designed as a lawnmower and includes a housing 12 in which a chassis (not shown) and a mower (not shown) are received. The mower includes cutting elements (not shown) that operate during operation of the tillage implement 10 be used for cutting grass. With the chassis are four wheels 14 connected. The tillage implement 10 is as an electric tillage implement 10 educated. An energy supply to the tillage implement 10 takes place either via a network connection or an energy storage, such as a removable battery pack. About the power supply is at least one electronics 16 and an electric motor 18 energized. The Electronic 16 is for controlling the tillage implement 10 , in particular for controlling the electric motor 18 of the tillage implement 10 , educated. About the electric motor 18 The mower, in particular the cutting elements of the mower, driven.

The housing 12 is with a guide device 20 connected via the tillage machine 10 can be guided by hand. The guiding device 20 has two guide links 22 . 24 on, which are telescoped into each other. The first guide member 22 includes a handle 26 with a grip area 27 , The handle 26 includes a switching unit 28 that are electrically connected to the electronics 16 of the tillage implement 10 connected is. The connection is made by way of example via a cable connection, but it is also conceivable that the connection between the switching unit 28 and the electronics 16 wirelessly. The electrical connection is made by way of example via a cable element 30 in the case 12 is attached and over a gap 32 in the case 12 is led to the outside. At one end of the cable element 30 is the cable element 30 electrically and mechanically on the handle 26 attached. In the connected state can by actuation of the switching unit 28 the electric motor 18 controlled, in particular switched on and off.

The first guide member 22 and the second guide member 24 are detachably connected. The first guide member 22 has a fixing unit 40 for releasably fixing the first guide member 22 on the second guide member 24 on. The fuser 40 has a control 42 on, wherein via an actuation of the operating element 42 the fixation of the first guide member 22 on the second guide member 24 is solvable. The second guide member 24 includes a pivot unit 44 about which the guiding device 20 pivotable with the housing 12 of the tillage implement 10 connected is. The swivel unit 44 further comprises an actuatable securing device 46 on, which in an unactuated state, a pivoting of the guide device 20 opposite the housing 12 prevented.

At the housing 12 of the tillage implement 10 is a collection container 48 releasably connected. The collection container 48 is especially designed as a grass catcher that encloses a volume of over 30l. The collection container 48 is particularly foldable designed so that it can be emptied and stored in the folded state to save space. Furthermore, the collection container 48 a display device 50 on, over which a level of the collecting container 48 can be displayed. Furthermore, the tillage implement includes 10 an actuator 52 for setting a cutting height of the tillage implement. Advantageously, via the adjusting device 52 the distance between the wheels 14 and the mower.

In 1b is the soil tillage implement 10 shown in the folded state. The guiding device 20 is by a movement of the first guide member 22 in the direction of the second guide member 24 pushed together and over the swivel unit 44 shown tilted.

In 2a and 2 B is in a partial perspective view of the fixing unit 40 shown. In 2a is the fuser 40 shown in the unactuated state, in 2 B the fixing unit is shown in the actuated state. The fuser 40 includes a fixing housing 54 in which the first guide member 22 is stored. The fixing housing 54 consists of two housing half shells 55 , which are connected to each other via screw connections. In 2a is for improved representation, only a housing half shell 55 shown. The first and the second guide member 22 . 24 each comprise two mutually parallel pipe elements 56 . 58 , The pipe elements 56 of the first guide member 22 have a larger pipe diameter than the pipe elements 58 of the second guide member 24 , Due to the different tube diameter, the second guide member 24 in the first guide member 22 telescopically along a telescopic direction 60 be moved. The fixing housing 54 is positively at least in and against the telescopic direction 60 with the pipe elements 56 of the first guide member 22 connected. For this purpose, the pipe elements 56 of the first guide member 22 two transverse bores each 62 on, the circular stops in the fixing housing, not shown 54 correspond. To a wear of each other and movably guided to each other pipe elements 56 . 58 is between the metallic tube elements 56 . 58 a tubular plain bearing 64 made of plastic. About the slide bearing 64 becomes the pipe element 58 of the second guide member 24 in the first pipe element 56 of the first guide member 22 guided so that there is essentially no direct contact between the two tube elements 56 . 58 arises.

The second guide member 24 , is along the telescope direction 60 relative to the first guide member 22 or relative to the fixing unit 40 movable in the first guide member 22 stored. The fuser 40 has two fixing elements 66 on, for immobile fixation of the first guide member 22 with the second guide member 24 are formed. The fixing elements 66 are linearly movable in the fixing housing 54 stored. The pipe elements 56 of the first guide member 22 each have a fixing opening 68 on, at the level of the fixing elements 66 is arranged. The second guide member 24 advantageously has a plurality of fixing holes (not shown), whereby it is possible, the first guide member 22 with the second guide member 24 to fix in different positions. In the fixed state, as in 2a shown, the fixing elements protrude 66 by a respective fixing opening 68 of the first guide member 22 and by a respective fixing opening of the second guide member 24 , So that the fixation does not dissolve, the fixing elements 66 each of a return element 70 acted upon with a force. The reset element 70 is exemplified as a coil spring. The reset element 70 encloses the fixing element 66 partially. The reset element 70 is axially between the fixing housing 54 and the fixing element 66 stored that starting from the return element 70 acting force in the direction of a fixing position on the fixing 66 acts.

To release the fixation, the fixing unit 40 a control 72 on (see 2c ). The operating element 72 is centered between the two tube elements 56 of the first guide member 22 arranged. The operating element 72 is movable relative to the fixing housing 54 and in particular movable along the telescopic direction 60 stored. Via an actuation of the operating element 72 become the fixing elements 66 against the force acting on them from the fixing holes 68 the first and the second guide member 22 . 24 emotional. The transmission of the operation of the control 72 acting force on the fixing elements 66 takes place in this embodiment not directly but via two transmission elements 74 , The transmission elements 74 are pivotable in the fixing housing 54 stored. The transmission elements 74 are essentially L-shaped. At a first end 76 grab the transmission elements 74 in each case an opening 78 the fixing elements 66 a, whereby the movement of the fixing elements 66 with the movement of the transmission elements 74 is coupled. The two transmission elements 74 are directly coupled together, which advantageously also the two fixing elements 66 mechanically coupled together. The two transmission elements 74 are in particular so directly coupled together that the two transmission elements 74 always be rotated substantially by the same angular range. The two transmission elements 74 are at a second end 80 positively connected and guided into each other. The positive connection takes place via a longitudinal groove 82 with a corresponding at least partially round positive-locking element (not shown). The outer circumference of the positive locking elements substantially corresponds to the width of the longitudinal groove 82 to realize a play-free as possible leadership.

The operating element 72 the fuser unit 40 extends over a length of about 38% of the distance 75 the pipe elements 56 from each other. In particular, an operating area extends 84 that is on the outside of the control 72 located about a length of about 38% of the distance 75 the pipe elements 56 from each other. The operating element 72 has on its inside two molded shots 86 on, leading to a positive connection of the operating element 72 with the transmission elements 74 are formed. The pictures 86 have a rectangular cross-section and are arranged parallel to each other at the same height. Upon actuation of the operating element 72 be in a power transmission area 88 , which is essentially due to the contact surface of the shots 86 with the transmission elements 74 is clamped, the force in the telescopic direction 60 in a rotational movement of the transmission elements 74 transfer. The rotational movement of the transmission elements 74 caused by the coupling with the fixing 66 a movement of the fixing elements 66 in release position. The distance of the power transmission areas 88 is about 25% of the distance 75 the pipe elements 56 from each other.

In 3a is the fuser 40a shown in a second embodiment. Components having substantially the same function as in the previous embodiment are designated by the same reference numeral and by an additional letter. In contrast to the embodiment of FIG. 2a and 2 B become the pipe elements 56a of the first guide element 22a and the pipe elements 58a of the second guide element 24a in the fixing housing 54a stored. The operating element 72a is in this embodiment directly with the fixing elements 66a coupled. The fixing elements 66a are each in a leadership setting 89a led, which obliquely to the telescope direction 60a extends, for example by 45 °. In the unactuated state of the fixing unit 40a becomes the operating element 72a against the telescopic direction 60a by means of two formed as coil springs return elements 70a acted upon by a force such that the fixing elements 66 be held in the fixing position.

In 3b is the fuser 40a shown in the actuated state. About an operating force on the control 72a in telescope direction 60a become the fixing elements 66a so through the leadership backdrop 89a perpendicular to the telescope direction 60a that moves the fixing elements 66a move in the direction of a release position. The operating area 84a of the operating element 72a that is on the outside of the control 72a is located, extends over a length of about 50% of the distance 75a the pipe elements 56a from each other. The distance of the power transmission areas 88a is about 70% of the distance 75 the pipe elements 56a from each other. Thus, in this embodiment, the distance of the power transmission areas 88a longer than the operating area 84a ,

In 4 is the pivot unit 44 shown in a perspective view. In the assembled state of the soil tillage implement 10 is the pivot unit 44 laterally from a housing element 90 covered to prevent ingress of grass or other contaminants, which affect the function of the swivel unit 44 could lead to prevent. The mutually parallel pipe elements 58 of the second guide member 24 are each with a swivel unit 44 pivotable with the housing 12 of the tillage implement 10 connected. For simplified representation is in 4 a housing element 90 hidden. For pivotable mounting of the second guide member 24 on the housing 12 have the pipe elements 58 of the second guide member 24 each a transverse bore (not shown on) on. About a bolt 91 (please refer 5a ) is the pipe element 58 pivotable about a pivot axis 92 with the housing 12 connected. Furthermore, the pivoting unit comprises 44 an actuatable safety device 46 in an unactuated state, pivoting the guide device 20 opposite the housing 12 prevented. The safety device 46 includes a via a spring element 98 (please refer 5a ) acted upon with force fuse element 100 axially movable, in particular along the telescopic direction 60 , in a receptacle 102 is stored. The fuse element 100 is on the outer surface of the second guide member 24 . in particular on the outer surface of the tubular element 58 of the second guide member 24 , arranged and encloses this along the circumferential direction at least partially. The fuse element 100 in turn, will from the receiving element 102 enclosed. Thus, the receiving element 102 and the pipe element 58 of the second guide member 24 for sliding mounting of the fuse element 100 educated.

In 5a is the pivot unit 44 with the safety device 46 shown in a cross section. The receiving element 102 is via holes (not shown) which are concentric with the transverse bores of the tubular elements 58 of the second guide member 24 are arranged pivotally with the housing 12 connected. In addition, the receiving element 102 via a screw connection 103 (please refer 5a ) rotatably on the first guide member 24 , in particular the pipe element 58 of the second guide member 24 , attached. The spring element designed as a helical spring 98 encloses an integrally formed in the receiving element 102 pin 104 and acts on the fuse element 100 along the telescope direction 60 in the direction of a fixing position with a force. The axial movement of the fuse element 100 is on the one hand, in particular in the direction of the release position, by the pin 104 limited and on the other side, in particular in the direction of the fixing position, through the housing 12 of the tillage implement 10 limited. In particular, the securing element 100 in the unactuated state by a housing bearing element 106 held that is hook-shaped. The housing bearing element 106 is radially outside of the receiving element 102 the security device 46 arranged. In the receiving element 102 are laterally two elongated recesses 108 arranged over the two opposing projections 110 of the fuse element 100 extend radially outward and an axial stop 111 of the housing bearing element 106 apply. The axial stop 111 is in particular in the hook-shaped region of the housing bearing element 106 arranged. Furthermore, each one of the projections 110 of the fuse element 100 an undercut area 113 and a sliding area 115 on, which are arranged opposite each other (see 5b ). The undercut area 113 is straight or rectilinear, the sliding area 115 is rounded. In the unactuated state of the swivel unit 44 is the lead 110 in the pivoting direction via two radial stops 114 (please refer 5b ) in the housing bearing element 106 held. Advantageously, by the hook-shaped portion of the housing bearing element 106 both the axial stop 111 as well as the radial stops 114 educated.

In Fig. 5b and 5c is the pivot unit 44 shown in an actuated state. The actuation of the safety device 46 takes place via an axial displacement of the securing element 100 caused by a loading of the fuse element 100 with a force through an unlocking element 116 he follows. The unlocking element 116 is exemplified by the fixing unit 40 , in particular by the fixing housing 54 the fuser unit 40 , educated. The fixing housing 54 the operated fixing unit 40 is along the telescope direction 60 relative to the pivot unit 44 so movable that the securing element 100 the security device 46 over the fixing housing 54 is acted upon by a force and thus actuated. In the actuated state of the swivel unit 44 is both the security element 100 as well as the unlocking element 116 from the receiving element 102 at least partially enclosed. As in 5b is seen by the operation of the swivel unit 44 the fuse element 100 , especially the lead 110 of the fuse element 100 axially from the axial stop 111 solved. The lead 110 is between the two radial stops 114 and in the recess 108 of the receiving element 102 while axially guided until the undercut between one of the radial stops 114 and the fuse element 100 is solved and thus a rotational degree of freedom of the guide device 20 is released. The guiding device 20 can thus in the actuated state of the pivoting unit 44 around the pivot axis 92 be turned until the guide device 20 on the case 12 of the tillage implement 10 is applied.

While unlocking the swivel unit 44 an axial displacement of the fuse element 100 by a linear movement in the telescopic direction 60 of the first guide member 22 relative to the second guide member 24 is required, the locking is done automatically by means of a pivoting movement, as in 5d shown. In 5d becomes the guiding device 20 along the pivoting direction about the pivot axis 92 moved in the direction of the locking position. The housing bearing element 106 is through the security device 46 acted upon with a force. In particular, the advantage lies 110 of the fuse element 100 at a radial stop 114 of the housing bearing element 106 opposite sliding stop 117 at. The sliding area is advantageous 115 of the projection 110 of the fuse element 100 so corresponding to the sliding stop 117 of the housing bearing element 106 formed such that a pivoting movement of the guide device 20 in an axial or linear movement of the securing element 100 is transmitted. Exemplary is the sliding area 115 of the projection 110 formed so rounded that the projection 110 at the sliding stop 117 , the oblique with respect to the telescopic direction 60 is formed, slides along. After the lead 110 of the fuse element 100 at the sliding stop 117 was passed, locks the fuse element 100 by the spring force of the spring element 98 positively in the hook-shaped region of the housing bearing element 106 one.

As in 6a shown is the movement of the first guide member 22 against the telescopic direction 60 over a boundary element 118 limited. The restriction member 118 is exemplified as the cable member 30 of the tillage implement 10 educated. The cable element 30 is outside the pipe elements 56 . 58 guided, but alternatively it is also conceivable that the cable element 30 within at least one of the tubular elements 56 . 58 is guided. The boundary element 118 is over a first attachment area 120 on the first guide member 22 attached and over a second mounting area 122 on the housing 12 attached, as in 6a is shown. The attachment of the limiting element 118 in the attachment areas 120 . 122 in particular is not tool-free, or at least a partial disassembly of the soil tillage implement 10 , detachable. Along the telescope direction 60 may be the distance between the first mounting area 120 and the second attachment area 122 in the actuated state of the fixing unit 40 to be changed. The length of the area in which the first guide member 22 can move relative to the second guide member is doing in the telescopic direction 60 by applying the securing device 46 through the fixing housing 54 and against the telescopic direction 60 through the limiting element 118 limited. The boundary element 118 is immovable in the first and in the second attachment area 120 . 122 attached that the first guide member 22 not over the end of the second guide member 24 can be pulled out. The boundary element 118 is formed so flexible that it is at least within a mounting portion 124 that is between the first attachment area 120 and the second attachment area 122 extends, can bend. Inside the attachment section 124 becomes the delimiter 118 at each relative movement of the first guide member 22 to the second guide member 24 bent. In addition, the limiting element 118 upon reaching an end position of the first guide member 22 against the telescopic direction 60 , both in the first attachment area and in the second attachment area 120 . 122 heavily loaded on train. To the durability of the limiting element 118 increase is the limiting element 118 reinforced in this area. The boundary element 118 is in this area by an additional protective layer 126 , which is formed by way of example from an enclosing rubber insulation, reinforced.

In 6b is a perspective partial section of the second attachment area 122 in the case 12 of the tillage implement 10 shown. The limiting element 118 is in a groove 128 guided. For fixing the limiting element 118 has the groove 128 Traction elements 130 on that the cross section of the groove 128 reduce in areas and the boundary element 118 fix in a clamped position when inserted. In addition, the groove 128 S-shaped, wherein the S-shaped portion substantially transverse to the exit of the groove 128 towards the first attachment area 120 extends. By the S-shaped guide of the limiting element 118 in the second attachment area 122 the limiting element becomes tense 118 at a load on train in the second attachment area 122 and is thereby kept in position.

In 6c is a perspective partial section of the first attachment area 120 in the fixing housing 54 shown. Analogous to the second attachment area 122 becomes the delimiter 118 also in the first attachment area 120 in a groove 132 guided. The groove 132 in the first attachment area 120 runs substantially parallel to the pipe elements 56 . 58 the guide device 20 , The groove 132 of the first attachment area 120 also has traction elements 134 on that the limiting element 118 fix in a clamped way. The boundary element 118 will be inside the groove 132 led directly in the area of the entrance U-shaped, as already by the S-shaped area in the second mounting area 122 a force caused by tensile load on the limiting element 118 acts on the fuser housing 54 transferred to. The groove 132 in sections by screw domes 136 in the fixing housing 54 educated. In particular, the U-shaped portion of the groove 132 through one of the screw domes 136 educated.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• CN 103283374A [0001]

Claims (10)

Hand-guided tillage implement, in particular a lawn mower, with a housing (12) and with a guide device (20), wherein the guide device (20) has two telescopically guided guide members (22, 24), wherein the first guide member (22) has a switching unit (28 ), wherein the second guide member (24) has a pivot unit (44) for pivotally supporting the guide device (20) relative to the housing (12) of the soil cultivating device (10), characterized in that a fixing unit (40) for releasable fixing of the guide members (22, 24) with each other on the first guide member (22) is arranged. Handheld tillage implement after Claim 1 , characterized in that the pivoting unit (44) comprises an actuatable securing device (46), which prevents pivoting of the guide device (20) relative to the housing (12) in an unactuated state. Hand-held tillage implement according to one of the preceding claims, characterized in that the first guide member (22) has an unlocking element (112) which is adapted to actuate the securing device (46) of the second guide member (24). Handheld tillage implement after Claim 3 , characterized in that the unlocking element (112) associated with the fixing unit (40), in particular by a fixing housing (54) of the fixing unit (40) is formed. Handheld tillage implement according to one of Claims 2 to 4 , characterized in that the securing device (46) comprises a spring-loaded securing element (100) which is movably mounted along a telescopic direction (60) in the securing device (46) and which is non-rotatably connected to the housing (12). Handheld tillage implement after Claim 5 , characterized in that the securing element (100) via a force application by the unlocking element (112) is actuated. Handheld tillage implement after Claim 5 or 6 , characterized in that the securing element (100) has at least one projection (110) which can be fixed in a housing bearing element (106) of the soil cultivation device (10). Handheld tillage implement after Claim 7 , characterized in that the at least one projection (110) of the securing element (100) and / or the housing element (106) of the harrow (10) for locking during a pivoting movement of the guide device (20) and for unlocking in an axial displacement of the securing element ( 100) are formed. Handheld tillage implement after Claim 7 or 8th , characterized in that the projection (110) of the securing element (100) and / or the housing element (106) of the harrow (10) have an undercut area (113) and a sliding area (115). Hand-guided harrow according to one of the preceding claims, characterized in that via a force on an operating element (72) of the fixing unit (40), both the fixing unit (40) and the pivot unit (44) can be actuated.

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